HDS of petroleum fractions is one
of the most important processes in the petroleum industry to produce clean
fuels. In particular, sulfur removal in diesel fuels is now strongly desirable
for environmental and technical reasons. For instance, HDS is used to prevent
atmospheric pollution by sulfur
oxides produced during the combustion of petroleum-based fuels, to prevent
poisoning of sulfur-sensitive metal catalysts used in subsequent reforming
reactions and in the catalytic converter for exhaust emission treatment.
Finally, to avoid corrosion
problems in engines. The basic nature of these compounds causes them to adsorb
onto Lewis acid sites on the catalyst surface, inhibiting the availability of
the sites. This poisoning may be reversible or irreversible, depending on the
HDS conditions.
High concentrations of organic nitrogen
compounds can cause significant deactivation for reforming, cracking, hydro
treating, or any other type of hydro processing catalysts. The present work
aims to study the inhibition effect of nitrogen compounds for HDS of DBT in VGO
at using carbazole and acridine as non basic and basic compounds respectively
over and prepared catalyst (PtMo/alumina) by finding inhibition factor and
adsorption constant for each compound in a trickle bed reactor.
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